After nearly five decades, United Nations peacekeepers are preparing to leave Lebanon, bringing one of the organisation's longest-running missions to a close. Established in 1978 following Israel's invasion of the country, the force has monitored hostilities, supported security efforts and helped protect civilians Who will fill the vacuum once the peacekeepers are gone?

• Guest: Ray Murphy – a former United Nations peacekeeper in Lebanon and Professor with the Irish Centre for Human Rights at the University of Galway
• Producer: Ali Benton